Friday, April 20, 2012

Guess the Genotype #65

This dog is a miniature schnauzer is one of the rather numerous mismarks seen in the breed and is actually expressing two different recessives that are not allowed according to the standard.

To begin, this dog is is liver. Liver is caused by a recessive gene and, as such, this dog must be bb liver.

Next, this dog appears to be solid liver. There doesn't appear to be any evidence that this dog is any of the other colors seen in the breed, namely tan point (black and silver) or agouti (salt and pepper). If this dog was either of these, there would be distinct pale areas on the face for tan point, and throughout the body for agouti. In the breed solid black (and thus liver, a diluted form of black) is dominant rather than recessive. There is a possibility that this dog carries non-black as the most common color in the breed appears to be salt and pepper. As such, I suspect this dog is Kk black carrying non-black.

Next, this dog is piebald. The coloration is known as particolor in the breed, but genetically it's still piebald. The only alleles on the Spotting locus that appear to be present in the breed are solid (S) and piebald (sp). As such, this dog must be spsp piebald.

Last, but not least, this dog also has ticking. There appear to be spots in the white on the face, back, and forelegs. From what I have seen, ticking appears to be quite common in particolor schnauzers. Since the spots are fairly sparse and there are also a lot of particolors that appear to have clear white, I suspect this dog is Tt ticked.